Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72edfde0eeeafe09eb30577bbad3d9866d4ffdc8e9713b441bb3665322721dac' 
  AND token = '9hkQyz+pkpvVmIfXn4KKHUqlfu6y3yzkvF/vD4TX8A8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}